Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb1b5a2378b6b86…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 03:35:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 100b3bfbadc391eefc495df385546239 SHA-1: 835edd0263cfbfba56be4d1e0f116715745004aa SHA-256: fdb1b5a2378b6b867df1c23d34c18e70a578b846eb49b612a5711f91c561804a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, strongly suggesting a phishing or malware distribution attempt. The document body text and extracted URLs promote 'free coins' and 'spins' for games like Coin Master, and also mention Roblox and Minecraft hacks, indicating a lure for potentially illicit gains. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/free-coins-coin-master-spins-game-hack
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/how-to-get-coin-master-free-spins-in-email_GM406889139.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/free-spins-coin-master-2021-today_GM406889139.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/roblox-catalog-free_GM431946152.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/how-to-use-roblox-hacks_GM431946152.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/how-do-you-get-free-robux_GM431946152.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/free-robux-giveaway-live_GM431946152.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/minecraft-114-4-download-free_GM479516143.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/free-robux-script_GM431946152.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/roblox-hack-generator-no-verification_GM431946152.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/coin-master-hack-no-root_GM406889139.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/how-to-hack-people-in-games-roblox_GM431946152.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/real-coin-master-free-spins_GM406889139.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/coin-master-hack-apk-online_GM406889139.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/free-outfits-roblox_GM431946152.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/coin-master-free-spins-link-download_GM406889139.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/free-to-play-minecraft-servers_GM479516143.pdf
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/free-coins-and-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000318e.bin
5ccda82f50ddd8bffed29b799cf0e8ec933543d6d1e6ab43c66ac65bac61774c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x318E 23324 bytes
font_01_sfnt_off00006642.bin
9c216cc6aa1e94c18ff26070eb99056dac407022fd31ef3f29cf2ac34e799f34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6642 18176 bytes

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